Hugo eaeetee



v(N0 Model.)

H. HAERTER.

SPRING BALANCE.

Patented Feb. 26,1884.

INVENTOR:

BY ml g WITNESSES ATTORNEYS.

UNITED STATES PATENT I HUGO HAERTER, OF NEW YORK, 3?. Y.

SPRlNG BALl-KNCE.

SPECIFICATION forming part of Letters Patent No. 294,227, dated February 26, 1884.

Application filed January 4, 1884. (X0 model,)

To (all whom, it may concern Be it known that I, I-Ivco HAERTER, of the city, county, and State of New York, have invented SpringBalances, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a front elevation of one of my improved spring-balances; Fig. 2, a sectional side elevation of the same. Fig. 3 is a front elevation of the same, the dial-plate being removed.

The object of this invention is to secure greater accuracy in the operation of springbalances, and. adapt said spring-balances to be made with shorter and stronger springs than is practicable when the balances are made in the ordinary manner.

The invention consists in a spring-balance constructed with a large and a small gear wheel meshing into each other, connected with a crossbar suspended from the graduated springs by a chain passing around the hub of the large gear-wheel, and provided with a coil-spring connected with the journal of the small gear-wheel, whereby great accuracy in weighing is secured, as will be hereinafter fully described.

Arepresents the frame of the balance, which is provided with a suspensionring in the or dinary manner.

To the top bar of the frame A are secured, by eyebolts l3 and nuts 0, the upper ends of two strong graduated spiral springs, D, the lower ends of which are attached to the ends of a short crossbar, E.

To the center of the cross-bar E is attached the upper end of the bar F, from the lower end of which is suspended, in the ordinary manner, the article to be weighed. 7

To the crossbar E is attached the end of a short chain, G, which is wound around, and its other end is attached to the hub of the large gear-wheel H. The gear-wheel H is journaled to the back plate of the frame A, and to a cross-bar, I, attached to the forward edges of the side bars of the said frame, which side bars are recessed to receive the said crossbar, so that the forward side of the cross-bar a new and useful Improvement inwill be flush with the forward edges of the said side bars. The teeth of the large gearwheel H mesh into the teeth of the small gear-wheel J, which is j ournaled to the back plate of the frame A, and to the bar K. The upper part of the bar K is bent inward and upward, and is secured to the back plate of the frame A by screws or other suitable means. The gear-wheel H has four times as many teeth as the gear-wheel J, so that one revolution of the said gear-wheel H will give the said gear-wheel J four revolutions.

To the journal of the small gear-wheel J is attached the inner end of a coiled spring, L, the outer end of which is secured to a stud or other support attached to the bar K. The spring L gives steadiness of movement to the gear-wheel J, and is made ofsutticient strength to turn the gear-wheels J H back to their places when the article being weighed has been detached, and the cross-bar E is being raised by the springs D.

l To the front of the frame A is attached the dial-plate M, through holes in which the journals of the gear-wheels J H project.

To the journal of the small gear-wheel J is attached a long index-finger, N, the outer end of which travels along a scale of divisionmarks formed around the edge of the dialplate. The scale is divided into ten spaces, and each space is subdivided to indicate frac tions of a pound.

To the journal of the large gearwheel H is attached a short index-finger, O, the outer end of which travels along a scale of divisionmarks formed upon the diaLplate 31 around the journal of the said gear-wheel H. The scale is formed of four equidistant marks, which are numbered 10, 20, 30, 4.0, in the reverse order from the large scale. With this construction the large finger X will indicate the weight from one to ten, or the units of weight, and the index 0 will indicate the tens up to forty.

Having thus described my invention, I claim as new and desire to secure byLetters Patent-- 1. A spring-balance constructed substantially as herein shown and described, with a large and a small gear-wheel meshinginto each other, and connected with a cross-bar suspended from the graduated springs by a chain passing around the hub of the large gearwheel, and provided with a coiled spring 0011- substantially as herein shown and described, nected with the journals of the small gearwhereby great accuraeyinweighingisseoured,

Wheel, as set forth. as set forth.

2. In a spring-halancqthe combination ,with HUGO I-IAERTER. 5 the cross-bar E, suspended from the graduated Witnesses:

spring D, and the large and small gear-wheels J AMES T. GRAHAM,

H J, of the chain G, and the coiled spring L, EDGAR TATE. 

